1. excellent, outstanding. [i.e. it knocks one off-balance].
|Orig. Hbk of Harlem Jive 146: Rock — Supreme pleasure, tops in dancing and music, finest esthetic delight.|
|Campus Sl. Mar. 7: rock – cool, awesome, or totally superior.|
|Da Bomb [Internet] 24: Rock: 1. Elite; cool; fun; exciting; loud.|
|Gutted 84: I’m rock. After the people-smuggling bust I’m...well, I’m solid.|
2. very firm, adamant, uncompromising [SE rock-hard].
|Outlaws (ms.) 40: Membership’s rock though, Ray says. They’re strict as fuck who they’ll let in.|