You'll find hiccups to be very rhythmic and not as powerful as a kick. DD used to get them all the time. This one, not as much yet, but he has made my belly jump so much dh could see it from across the room.
Yep sounds like kicks/punches!! Hiccups are exactly like @Jessie333 described - rhythmic with pauses between the thumps for lack of a better explanation - just like your hiccups are, just on the inside it could be that LO it turned and has his/her back against yours, so you're feeling lots of legs and arms moving all over up front!
Re: My entire belly is jumping!
https://forums.thebump.com/discussion/12434933/squeeee#latest
https://forums.thebump.com/discussion/12434608/weird-feeling#latest