In a state of moist and liquid although a squishy state, almost as like slime ;squishy and wet but not sticky
His jubby pussy dropped to the ground, making a big bounce noise
To “Jub” means to proceed on an action that is neat or impressive to others, typically persisting to something of practical value.
Person 1: did you see Ryan got an A on his math final?
Person 2: Yes, he totally jubbed the test.