Here, I did your homework for you.
[wtf is ableist language?]

Instead of retarded/herp derp/etc
[why retarded is ableist]

[why herp derp is ableist]

1. bad
2. uninteresting
3. boring
4. nonsensical
5. not worthy of attention
6. awful
7. silly
8. ridiculous
9. illogical
10. terrible

Instead of crazy/insane/mental/etc
[why it’s ableist]

1. bad
2. illogical
3. erratic
4. nonsensical
5. ridiculous
6. uncontrolled
7. unpredictable
8. too much
9. strange
10. unusual

Instead of lame
[why it’s ableist]

1. bad
2. boring
3. frustrating
4. a waste of time
5. tiresome
6. unoriginal
7. uncreative
8. disappointing
9. embarrassing
10. tedious

Instead of dumb/stupid/idiot/etc
[why it’s ableist]

1. bad
2. poorly thought-out
3. illogical
4. incorrect
5. ridiculous
6. unthinkable
7. a waste of time
8. silly
9. trifling
10. pandering

I’m making this post mostly so I have something to link people to going forward whenever I have the bandwidth to point this stuff out. I know it takes practice and thought. I’m still practicing, too. I welcome any and all call-outs if you see me using ableist language around town or on the internet.

(graphic by AuthenticEccentric)