Perhaps the iconic highlight of Irish Drinking Song is the ending line delivered by Colin Mochrie (Who had to rhyme with what Wayne, and on occasion Brad had last said). On many occasions his ending line would get the cast to double over, leaving Colin to finish the final chorus.
US Version - ABC/ABCFamily Seasons
US-302 - "He's worn a thong for hours" (Topic: Drew Carey I)
US-305 - "Ha Ha Ha, Hee Hee!" (Topic: Voted for Ross Perot)
US-306 - "It looked like someone had beat her" (Topic: Slept with an Ugly Woman)
US-309 - "I'll rub Colin's head!" (Topic: Drew Carey II)
US-325 - "Be host on TV!" (Topic: Lobotomy)
US-328 - "He put my stone back in my end!" (Topic: Got Mugged)
US-420 - "I'll redecorate, I'm gay!" (Topic: Got Arrested)
US-422 - "I'll rip out his heart!" (Topic: Divorce I)
US-412 - "Sitting on my Ash!" (Topic: Graduation I)
US-421 - "My pants fall on the floor!" (Topic: Hair Transplant)
US-425 - "You can get poo from Fud" (Topic: Got Pregnant on a Date)
US-506 - "I peed my pants" (Topic: Knocked over the X-Mas Tree)
US-517 - "And then we both will fart!" (Topic: Marriage)
US-514 - "There's blood in my stool!" (Topic: Graduation II)
US-603 - "MEOW!" (Topic: Yelled out the Wrong Name in Bed)
US-606 - *Sly Grin* "....." (Topic: Graduation III)
US-520 - "She was a man!" (Topic: First Kiss)
US-505 - "Oops! I poo'ed" (Topic: Passed Gas)
US-428 - "OH... Grand!" (Topic: Giving Birth)
US-7003 - "She took her thong off in Any weather!" (Topic: First Car)
US-7004 - "She has gravel in her snot!" (Topic: Fell out of the Car)
US-7021 - "Joe had a Nice Bone!" (Topic: Broke Up)
US-8012 - "I'll comb it over, HEY?!" (Topic: Hairy Back)
US Version - TheCW Seasons
Appearance on the Arsenio Hall Show - "He arrested me for swallowing a ball!" (Topic: Police Lunch Date)
US-10x05 - "We never circumcised his bone!" (Topic: Brand New Baby)
US-10x08 - "Yak-Kak-Kak-Kak-Kak!" (Topic: Divorce II)
US-10x17 - "Ooh I get some wood!" (Topic: Date at a Pancake House)
CW Seed's Whose Line Mini's - "Hey! A Fetus" (Blooper - Pickup)
Live Stage Shows
Whose Line is it Anyway? UK - Live at Adelphi - "I'll never see a snatch!" (Topic: Circumcision)