[Vivienne]

I feel bonkers tonight. Just thought I would tell everyone..... I think it's due to tiredness...

[Boboff]

2. bonkers 17 up, 3 down

Bananas, nuts, crazy, wild, ballistic, cuckoo! Any thesaurus will do.
Quite commonly used word, not slang, used to affectionately describe a state of mind such as the above.
Hand-in-hand vocabulary with for example: gor-blimey, bastards!, bollockchops, well I'll be a pissed on candle, crikey, shove it up your arse, and bollocks! Used in the UK at least.(>London<)
Humorous sub-text in use due to its (click the link) 'bonk' attribute, as in copulation of the 'Carry On' sort also bonk could be a hit, say on the head that has comedy value.
To enhance, say: 'bloody bonkers' or 'blimmin bonkers' or 'bloomin bonkers' or 'absolutely bonkers' (esp.)

-He's definitely gone bonkers, that boy.' (crazy in the head)

-They told me they lost the paperwork.
-Did you get mad?'
-I went absolutely bonkers (mad at them)

-I could have sworn I left it here on the frigde, I tell you I'm going bonkers

[Vivienne]

Thanx, Bobogg

[Zoot]

The wookie has indeed gone Bonkers

[Quincy]

bonkers?

not now sorry im busy

[Vivienne]

HA. That's not the sort of thing I meant.

[DemonHorse]

I thought you were bonkers most of the time Viv? at least that's what the voices told me.

[Yudster]

Bonkers or drunk?! Either is good.......

[foot-loose]

... both is messy.

[Yudster]

Well, its Viv - she'll carry it off superbly.

[Zoot]

No no no no, don't Bonk with my heart...