YOU SAID:

I have horrendous gas

INTO JAPANESE

私は恐ろしいガスがある

BACK INTO ENGLISH

I have terrible gas

INTO JAPANESE

私はひどいガスがある

BACK INTO ENGLISH

I have a bad gas

INTO JAPANESE

私は悪いガスがある

BACK INTO ENGLISH

I have bad gas

INTO JAPANESE

私は悪いガスがある

BACK INTO ENGLISH

I have bad gas