Pokka

Olla pokkaa is quite close to have some nerve. The word pokka comes from pokerinaama, a pokerface. Here are some sentences that might help you get the idea:

• Miten sulla on pokkaa sanoa noin? - How can you say like that?
• Mulla ei ole pokkaa pyytää lisää palkkaa. - I don't have the guts to ask for more salary. 
• Mulla ei olisi pokkaa tehdä noin. - I wouldn't dare to do like that. 
• No on sillä pokkaa! - Well s/he's got some nerve!
• Sen pokka petti. - He bursted into laughter.

Finnish songs with pokka:

• Irina - Pokka 
• Haloo Helsinki! - Jos mun pokka pettää