Premine - someone(s) mining the coin before it is released to the public (usually they will state these are for "bounties" or for the coin's "federation", etc. personally, I say stay far away from any coin premined for ANY stated reason, but that's just me. Others may disagree, but usually because they too hold at least a few (probably more than a few) of the coins in question.
instamined - someone(s) ready to mine the coin very quickly after release
ultra instamined - someone(s) ready to mine the coin with a very high hasrate (large number of machines/GPUs when the coin is released
ultra instamined - See the 500 MH/s mining of LuckCoin from block 0-1k. Not a single working pool and a single miner crushing the network for 1000 blocks handing everyone else only orphans.