ima hold that down

basically it means ima keep my opinion to my self or on the DL (down-low).

person1: so what do u think about them together?...

person2: ugly couple
person3: yanno what ima hold that down it aint my buisness..
person1: truee

hold-down bitch

Someone who holds it down for someone, preferably a female.
Someone who is loyal to someone else no matter the circumstances

“Damn sis you really stay loyal to that man even though he behind bars for 2 more years”
“Yeah cause i’m a hold-down bitch”

hold that down

To stop, To Chill when doing or saying something outta pocket

*Tantrum is being thrown*
Person: AYE! HOLD THAT DOWN NOW