Expression used by cyclists to describe excercise induced low blood sugar levels; being a feeling of light-headedness and weakness in all limbs. Similar to 'The Wall' in running. Has fallen out of usage in recent years due to alternative meanings.
I am feeling a bit light-headed, if I don't have a banana, I think I'm going to bonk.
I've got the bonk.
I bonked really badly and had to get a lift home.
I've got the bonk.
I bonked really badly and had to get a lift home.
by Comedy Dave June 5, 2004
Get the bonkmug. The sound that "The Scout" character makes when hitting enemies with his aluminium baseball bat in the video game Team Fortress 2.
Who want's some a' this! BONK!
by Timic83 June 12, 2008
Get the bonkmug. 
1) A word used to get on other peoples nerves.
2) When poking someone, some people say "Bonk! Bonk!"
2) When poking someone, some people say "Bonk! Bonk!"
by K-aye May 3, 2006
Get the bonk! bonk!mug. 
A one-of-a-kind term that wholeheartedly encompasses stupidity and and insularity when spoken out loud. Popularized by a first generation Chinese-Canadian, "Bonke" is an abbreviated pseudonym that originates from its contemporary British-English slang term, "Bonkers". The term "Bonke" in of itself showcases a notable removal of "rs" from the end of the word, and is purposely intended to resemble the similar term, "monke".
An excellent example of this would be...
Thomas: "Ayy lad, you best get your arse a'lickin and skedaddle outta here."
Joseph: "Bonke"
Thomas: "Ayy lad, you best get your arse a'lickin and skedaddle outta here."
Joseph: "Bonke"
by Mr.Kinslayer February 14, 2021
Get the Bonkemug. 