There is no limit to personal fouls, there is a limit to unsportsmanlike conduct and that limit would be 2. The difference between those two is contact. A UNS is a taunting, cussing, shooting the bird, spiking the ball, etc anything without contact.
If there is contact it is a personal foul and there are many classifications, from a chop block, a facemask, late hit out of bounds, piling on, etc.
However, a personal foul that is deemed to be flagrant includes an immediate ejection as well as any "fighting" acts. Kicking/punching etc. a simple push or shove after the play does not qualify as fighting.