Question about Merlin's pants.

[zanooda2]

Hi guys! Please help me with English once more. OK, Merlin's pants are mentioned several times in DH (that's "pants" in the British sense of the word, right?), but my question is actually about this unfinished sentence: "So why in the name of Merlin's saggy left..." (p.92 Am. or p.81 UK). What the ending of this sentence may be? Please give me some idea. I'm not asking just out of curiosity, this is needed for a translation :-).


zanooda