Are there any lines of dialogue in Doctor Who which (unintentionally) make you p-i-s-s yourself laughing? Something about the way an actor says a line the wrong way, or just the cheesiness of the line itself?
There's one that always works for me, and its the Gods of Rrrrrrragnorrrrrok in Greatest Show. There's just something about the line "Entertain us... entertain us, or DIE!" that makes me giggle.
The one that springs to mind is Morgaine in Battlefield declaring that she's the Battle-Queen of the Spracks. The WHAT?!
Not the dialogue, but the delivery: the Day of the Daleks' Ogron's ' No complications.'
Not the Mind Probe!
"I mined it from Uranus myself!" Mavic Chen in Daleks masterplan...
the Tollmaster from Delta and the Bannermen trying to escape from Gavrok by running into a wall.
"Well, this is gay!"
---Second Doctor, The Macra Terror