What is Bucking?
1.
to snort a line of cocaine or any substance up your nose.
"we were bucking coke last night"
"want to buck some K?"
"did you buck?"
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2.
bucking = back fucking
basically, a guy rubs his hard cock on the groove on the back of a girl, right above her ass until he cums all over her back.
yeah man, me and julia were bucking last night. i jacked off my huge cock between that little groove in her back and came all over her back and her hott ass.
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3.
to snort a line of cocaine or any substance up your nose.
"we were bucking coke last night"
"want to buck some K?"
"did you buck?"
See
4.
Engaging in consensually aggressive, uninhibited, or particularly enthusiastic intercourse. May also denote Sado-masochism or the Cowboy position.
"we were bucking like wild beasts all night."
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5.
Throwing up after consuming
"I was trying to clean up her vomit while she was bucking in the toilet"
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6.
Rogering someone that the Bucker considers to be a complete and utter bastard, usually anally and with an inanimate - or animate if the occasion calls for it - object.
Man 1: I've just had a thought. Let's buck Matthew Caris with a jar of marmalade.
Man 2: Yes, his crack is big enough! Let's go!
*Men walk to the Marmalade Shop*