Top definition. swagging. Swagging, the motion of which you do sexual actions. Swagging while dancing of doggy styling/dry humping a girl from the back in a rhythmic motion. Swagging by yourself is the motion of which a guy masturbates, in this he preforms in a rhythmic motion also. Yo i was swagging that girl so hard yesterday on the dance floor. #swag#swagged#swagger#swagging#swagges.