Denshi Jisho — Online Japanese dictionary

俺 おれ I; me (rough or arrogant-sounding first-person pronoun, formerly also used by women)
Common word, Pronoun, No-adjective, Male term or language 
俺ら おいら I; me
Pronoun, No-adjective 
俺ら おれら 1: we; us;
2: I; me
Pronoun, No-adjective 
俺様 おれさま I, myself (pompously)
Pronoun, No-adjective 
俺達 おれたち we; us
Noun, Male term or language 
俺たち おれたち we; us
Noun, Male term or language 
俺っち おれっち 1: (Male term or language) we; us;
2: (Slang) I; me
Noun 
俺等達 おいらっち we; us
Noun, Archaism, Male term or language 
俺が俺がの連中 おれがおれがのれんちゅう ego-driven men
Expression, Noun 

You can also

Look up kanji details for 俺.

Try a Yahoo Jisho search for 俺 .
Try a Goo Jisho search for 俺 .
Try a Google search for 俺 .