# I can be a number

See me once, I don't want to, shoo!
See me twice, care what you say, for I'm a taboo

See me once, I can be a number
See me twice, the sports team likes to slumber

Hints will come bidaily. Good Luck!

If you are not familiar with my See me once riddles, I recommend you first have a look at the latest riddles in this series:
#6, #7, #8, #9

See me once, I don't want to, shoo! See me twice, care what you say, for I'm a taboo.

No! - as in go away.
no-no - a taboo

See me once, I can be a number. See me twice, the sports team likes to slumber.

No. is an abbreviation for number.
A no-no in baseball is a game in which the pitcher does not allow any hits.

• Tom, you see through my riddles as if they were out of glass! I'll accept your answer in a bit. Well done! Commented Nov 2, 2018 at 11:15
• @Cashbee: Q1. See me once your format is good, see me twice your format is sweet. More personally, Q2. See me once I'm a cat, see me twice I'm a drum :P
– Tom
Commented Nov 2, 2018 at 11:36
• Oh dear, give me some time to understand :D Commented Nov 2, 2018 at 12:12
• shame on me, but I don't get it. Unless you mean the band purrpurr :) Can I haz a hint? Commented Nov 2, 2018 at 13:55
• @Cashbee I think it's my bad puzzle as it is two separate questions/answers. Q1 Is good but French. Q2 is something personal to me!
– Tom
Commented Nov 2, 2018 at 14:03

G?

I can be a number:

Graham's number?

Sports team slumber:

as in GG (Good Game)?

I think I have something!

0 (the number)

See me once, I don’t want to, shoo!

Still not sure

See me twice, care what you say, for I’m a taboo,

Well, saying “00” in mathematics without anything in front is generally frowned upon.

See me once, I could be a number

It is a number

See me twice, the sports team likes to slumber

after a 0-0 score, the sports teams seem like they’re almost asleep

• It's not the answer, but coincidentally one of the clue explanations is actually correct :) Commented Nov 2, 2018 at 11:05