Yup, thats poison oak   

Do you have it on your face too?  I had a few patches on my face one time, and I couldn't shave for weeks

luckily the last time I had poison oak it was during the onset of the facial hair growth part of puberty so I didn't have to shave anyways haha.  If that happened to me now though I would be a mountain man by week 2.  It doesn't look like mudguts is too concerned with the shaving aspect though haha.