Shag ass (out of something or some place) spoken language rude slang
To move from someplace in a quick and hurried way.
It's 7 am. You better shag ass, otherwise you will be late for the lesson.
The train will leave within 30 minutes, guys shag ass.
Shag ass man because we won't wait for you.
To describe getting out of some place reluctantly or lazily.
To catch the early coach this morning, I had to shag ass out of my bed at four.
To seduce and make someone think you're in love with them (the fact is that you're not) then leave them
To flee or run
To move quickly up and down and from side to side, typically in an attempt to avoid hitting or being hit by something
To leave a place, especially to start a journey
I'm leaving
It's mostly used in the present tense.
Extremely ugly; unlovely; unattractive
I hate frogs because they’re as ugly as sin.