MK, The first expression is straightforward, but on the second I can’t say for sure, having never seen that particular one, but I will take a reasonable guess.
Cassell’s Dictionary of Slang:
PUT IT WHERE THE MONKEY PUTS THE NUTS: phrase [20th century] a phrase of coarse dismissal, i.e. shove it up your arse! [[very subtle!!]]
I’M SURE IT WAS’T ALL JAM: ‘Putting on the jam’ is an old expression I remember from way back (but haven’t heard it for a very long time), which always meant to me ‘putting on airs.’ According to Cassell’s, however, JAM has many, many slang meanings (19). I’m going to take a guess that the one referred to here is the Australian slang expression for ‘adopting a self-important, pretentious manner or using affected speech.’ [[putting on airs]]. This would imply that your expression means that the I’m sure the behavior observed wasn’t all affectation, but was wholly or partially genuine and is just how that person sometimes naturally acts or talks.
JAM: noun [late 19th century] (Australian) affectation, pretentiousness; thus ‘put on the jam,’ to act in an affected manner, ‘jammy,’ affected [the image of spreading jam on bread]
Ken G (Fort Collins, CO, USA) – November 7, 2002
Reply from Ken Greenwald (Fort Collins, CO - U.S.A.)