Anything labelled 'knee length'.
Considering I have a 27" inside leg measurement and they still barely cover half my thighs, anybody not as stumpy of leg as me must need a bikini wax to be able to wear the bastarding things.
There is more to life than a thousand frocks in only ditzy florals or animal print. Can we not have things in plain colours that aren't all black? Texture's alright, it's the bloody awful prints that by now all look the bloody same.
I don't actually want my tits out at work, but I can't stand having choking necklines, either.
Don't mind slightly puffier sleeves, as at least that means I can keep going to the gym and not frighten late middleaged male professionals with my bicep development unless I want to.
All trousers. Not because I dislike trousers, but because Standard, Short and Extra short means absolutely FUCK ALL. Give me an actual measurement for the actual item of clothing you're flogging, not a generic size guide that also bears precisely zero relation to anything you're selling.
If I allow trousers to pass because it's not their fault I'm a miniscule 5'6" (yes, sarcasm, above average height yet still too short for their trousers), trousers without pockets and no belt loops. It's going to gape at my lower back. At least give me the option of using a belt for a) finishing off the outfit and b) not giving all and sundry a good look at the underwear.
Frill, flounces, tiers and ruffles.
Leather (well, plastic) as an item of officewear.
Cut outs, deep splits and nightshirt hems.
Blazers with ready destroyed - sorry, ruched - sleeves. Give me the choice to do the Miami Vice thing, damnit. And stop with the 'relaxed'. All that means is you can't be fucked with paying the extra for some decent stitching and lining. And the pockets are going to be fucking fake.
'Recycled'. Yeah, you mean 'synthetic', don't you?