chonk up.
In plain English, “chonk up”: become fat.
What does chonk up mean?
For “chonk up”, this entry covers the following meaning: become fat.
See how it lands.
Original examples written for this entry, not quotations from the sources.
After the feast, the rabbit, which had been skinny all winter, started to chonk up.
When I left the treats out, my hamster began to chonk up quickly.
The right word.
The right moment.
Choose this wording when the meaning above fits what you intend to say. Give the reader enough surrounding context to follow the example; if clarity matters more than the shorthand, use the plain-English wording instead.
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Not quite the same as…
Other readings
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A little backstory.
This automated entry does not establish a first coinage. Consult the linked references for documented history.
Still wondering?
How can I check whether this meaning of “chonk up” fits?
Substitute the plain-English meaning into the entire sentence, as in the examples. Keep the surrounding situation in view. If the result does not make sense, ask for clarification rather than assuming this is the intended reading.
How can I make my own message clearer?
Add the missing context or choose a direct description of what you mean. Read the whole message back before sending it, especially if another person could take the label differently.
Sources & checks
Meaning and factual notes are informed by the references below. Examples and usage advice are original editorial writing. A source documents use; it does not measure current popularity.
- chonk up — English entry, revision 93485032 ↗Wiktionary contributors · checked 27 Oct 2026Supports: summary; meaning; partOfSpeech
Is “chonk up” safe for school or work — and how do you reply?
General-audience informal vocabulary (SFW): “chonk up” is a general-audience expression (informal) included in our 100% SFW ESL Classroom Kit. It fits casual group chats and informal conversation, but should be translated into standard English in formal client or academic writing (translate with the Corporate ↔ Gen Z tool ↗).
How to reply when someone uses “chonk up” in a chat: Match the speaker’s register (informal). If they are joking or exaggerating, a brief acknowledgment (such as bet, no cap, or grand) fits; if the message is in a professional channel, reply in plain English: “After the feast, the rabbit, which had been skinny all winter, started to become fat.”.
Embed “chonk up” on your site, blog, or course
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Compare usage: chonk up vs. 10th dentist ↗ · chonk up vs. 2moro ↗ · chonk up vs. acoustic ↗
Academic & press citation
SlangLane Editorial & Linguistics Lab. (2026). “chonk up” — SlangLane Open Reference Corpus (Release daily-2026-10-28). CERN Zenodo. https://doi.org/10.5281/zenodo.23541347 · Canonical URL: https://slanglane.com/terms/chonk-up · All PDF working papers ↗