Mech_Dood...would that happen to be a shot of Bushmill's whiskey dropped into a pint of Guinness?
If so, I've always heard those called a "car bomb".
There's also a drink I've heard of called a "flaming Dr Pepper", where a shot of Bacardi 151 is dropped into a beer, then the pool of liquor that floats to the top is lit...and you drink it while it's on fire. Folks say it tastes like Dr Pepper. Sounds like nasty stuff to me.