Your mum's watching!

A phrase used to put pressure on the person who is about to focus or carry out an important action, in 90% of cases resulting in the person performing an epic fail.

The term is so useful as there is not a single person on the planet that will not get intimidated by a mother's look of disapproval and even a thought about your mother watching you fail makes you nervous as hell, so you will almost certainly cock up whatever important thing you are doing.

Jack: *tries to take a penalty shot*
Troll: Your mum's watching!
Jack: *feels nervous and pressurised, then realises that mum is not really watching* Fuck Yeah.

*still misses penalty*
Troll: LOOOL