“This is How We Do” is a recently released song by Katy Perry. The chorus “this is how we do”, which is also a commonly used phrase, essentially it literally means “this is how we live” or “this is how we do it“. In this song Katy sings about the interesting things she does and how she lives, and is essentially letting people know “this is how we do things”. It's not much used as slang but a daily expression.

FACE HOLE

face hole - the hole of a face such as: a mouth, nose, eye sockets, and or ears.

HANGRY

LGBT - Gay Vocabulary in English

CUSS WORDS

Words that have been deemed inappropriate and you dont normally hear in public or "normal" conversation.

e.g. : fuck, shit, asshole, whore, bitch and so on... 

People may react strongly when hearing such vernacular, so be careful if ever using it.