Doing a Cullum 

To claim you wish to do something, then proceeding to get distracted for upwards of fifteen minutes before remembering the original task at hand.

Cullum: Hey do you want to play a game in a minute?

You: Yeah sure
*Cullum doesn't come back to his computer for half an hour*
Cullum: Sorry for the wait I went to the shop.

Cullum: Want to play a game after I've finished my work? ETA is 10 minutes.
You: Okay sure
Cullum: Be right back I'm gonna get a coffee before we start
*Cullum has actually gone to the pub after disappearing for 20 minutes*
You: Looks like he's Doing a Cullum

Doing a Cullum by Maxiesnax1 June 8, 2020

Doing a callum 

Doing a callum is where a girl instantly ignores you or tells you to piss off or go away

Oi mate your doing a callum by getting ignored by that girl she told you to piss off 😂

Doing a callum by Jamie pollard Callum’s mate October 28, 2018

Doing a Callum 

The act of punching someone who is unaware while seating.

Oh wow dude that guy who got thrown out, got caught doing a Callum!

Doing a Callum by RyanOliver65 June 29, 2022

Doing a Callum Styles 

Acting like a chimpanzee and throwing your shit all over the walls

Fuck I must’ve been drunk last night because apparently I ended up doing a Callum Styles, the walls are a mess and my girlfriends not speaking to me.

Doing a Callum Styles by Big pizzle P October 2, 2020