Two's up is a very old Yorkshire expression meaning, "Save me a small amount of what you're currently consuming" It was originally used by miners who were hungry and wanted a piece of pie from one of their more fortunate colleagues. It became more popular in the 70's and meant "share your cigarette with me".

It’s an acronym standing for Can’t Remember A Fucking Thing. It’s usually used to describe embarrassment at being unable to remember someone (CRAFT moment); going onstage as the lead in the latest theatrical performance and your mind goes completely blank (CRAFT situation); the next morning after a night when you got pissed as a fart and woke up in bed cuddling a traffic cone and a string of fairy lights wound round your prick.

nutha way 4 sayin save me half (on cig)

two's up is the act of slipping one in a lady friend whilst your friend does the same on another orifice

A song by Australian Rock N Roll band AC/DC on their 1988 album Blow Up Your Video

giving a girlsome double penetration

The phrase a townie uses to ask for something.