You will realize that a lot of the .pmp files the sounds are avaiable doesn't make any sense. But it's like that with all sounds. I think I never heard of the last line before, and I suspect it was meant to be the line Duke would say to Cyber-keef, similar to how he does for the second and third bosses.
E1L1.pmp "Where is it?" E1L1.pmp "Ahhh..." E1L1.pmp "Hmm... don't have time to play with myself." E1L1.pmp "Damn, those alien bastards are gonna pay for shooting up my ride." E1L1.pmp "Hehehe... what a mess." E1L1.pmp "Oooh, I needed that." E1L1.pmp "Ahhh... much better." E1L1.pmp "Damnit." E1L1.pmp "Fire in the hole, asshole!" E1L1.pmp "They don't make em' better than me" E1L1.pmp "Cool." E1L1.pmp "What are you waitin' for? Christmas?" E1L1.pmp "Bitchin'." E1L1.pmp "Holy cow!" E1L1.pmp "Holy shit!" E1L1.pmp "Groovy!" E1L1.pmp "Suck it down!" E1L1.pmp "Damn I'm good." E1L1.pmp "See you in Hell!" E1L1.pmp "Let God sort 'em out." E1L1.pmp "Come get some." E1L1.pmp "Blow it out your ass!" E1L1.pmp "Yeah, piece of cake!" E1L1.pmp "Who wants some?" E1L1.pmp "Eat shit and die." E1L1.pmp "Ooh, that's gotta hurt." E1L2.pmp "You wanna dance?" E1L2.pmp "Shake it baby." E1L3.pmp "I think I'll climb aboard." E1L3.pmp "Hmm... that's one Doomed space marine." E1L4.pmp "I should have known those alien maggots booby-trapped the sub." E1L5.pmp "I'm Duke Nukem, and I'm coming to get the rest of you alien bastards." E1L6.pmp "Let's rock." E1L6.pmp "Ready for action." E1L6.pmp "Gonna rip 'em a new one." E1L6.pmp "Your face, your ass, what's the difference?" E1L6.pmp "It's down to you and me, you one-eyed freak!" E1L6.pmp "Hail to the king baby." E2L1.pmp "Nobody steals our chicks... and lives." E2L3.pmp "Hmm... looks like I have the con." E2L10.pmp "God damn aliens." E2L10.pmp "Never meet an alien I couldn't kill." E3L1.pmp "Born to be wiiiild!" E3L1.pmp "It's time to kick ass and chew bubble gum... and I'm all out of gum." E3L1.pmp "This pisses me off." E3L4.pmp "I ain't afraid of no Quake." E3L5.pmp "Damn, that's the second time those alien bastards shot up my ride." E3L10.pmp "You outta here." E3L10.pmp "Suck on this!" E3L10.pmp "So many assholes, so few bullets." E3L11.pmp "Terminated." E3L11.pmp "Squeal piggy, squeal!" E3L11.pmp "Haha... makin' bacon!" E4L3.pmp "Shit happens." E4L6.pmp "Nobody wears flares... and lives."