Fully

1. Word used to express complete agreement with an undeniable statement.

Person 1: Dude, can’t deny, ass or face over tits. Any day.
Person 2: Fully.

Slight

Something sublely noticeable or unusual. Often used in a humorous context.

Person 1 : Yo look, that kid just spilt his coffee. Look at him dart his eyes across the room. You can tell he thinks nobody saw.
Person 2 : Haha, that’s slight.