To put simply the quick tapping of another blokes arse in a non-sexual way, often used as friendship/masculinity building, the bum tap is a common trope in senior rugby normally used to congratulate a successful play, a ploy to encourage one's teammate/ get someone moving or as an introductory action to a conversation.
Successful attempts may be met with such responses as
"Good contact!"
"Solid Hit!"
"How are we boys" -(When introducing oneself)
"BOOM"
"G UP MATE"
Attempts may be as hard as the user intends however too soft of a hit may throw the tapper's sexuality into question, or create direly awkward situations.
The Golden Rule however is, Do. Not. Hold. Ever.
No matter what. Nor squeeze.
Bloke 1: "Man Dougan's such a queer kent"
Bloke 2: "Why's that?"
Bloke 1: "On the pitch he gave a bum tap, and held!"
Bloke 2: "The fuck mate, that is not alright"
Bloke 1:"Ay"
A friend with benefits who solely has sex in the bum.
Gavin and Steph are not bum friends
The final part of turd that will not fully depart and regardless of how much toilet paper you use, it continues to draw its mark.
I ran out of loo roll last night. Damned bum crayon!
A cum bum is simply a cum bum. Cumming in Bumming is also another way to say it.
" you're such a cum bum"
"Fuck you Cunt"
A nick name for anyone named Nicolas.
"Nickle" "ass"
"Tin" "bum"
An area located beneath the Buttocks, If ticklish it is open to the act of Under-Bumming, where a second party uses a hand to squeeze the area as a method of acute torture.
Usually not to extract information, But to extract uncontrollable laughter and strange noises from the Under-Bumee.
Person 1 : I'm bored, I'm going to Under-bum you!
Person 2 : NO! I cant take another Under-bumming!
The blue gloves that firefighters and paramedics put on when waking up passed out bums in public places.
I think this guy pissed his pants. Better put on the bum touchers.