a night on the town heavily drinking with your friends, pub crawling.

the thing that you don’t have when you’re phones percentage is over 20

Heavy Drinking, usually at night time and purpotrated by a group of "lads", although females occasionally can join.

to go out have a good time drink loads, smoking loads, and bantering and pulling loads of people

lash means 2 have raw sex

wen u b lashin a mandem/galdem
ur basically avin sex init
standard procedure

1. Lashings of: a large amount of, used mainly to refer to things like cream, custard etc.
2. Lash: to strike with a whip
3. Lash together: to bind together with ropes etc
4. To get lashed: this is simply to get very drunk/pissed inebriated/sloshed/hammered/legless/rat-arsed /etc. Lash can also be used as a noun meaning alcohol.

As in: 'Hey, do you fancy going out and getting lashed tonight?'