Verb (5-dan, う, transitive)
1.  to carry on one's back
2.  to be burdened with;  to take responsibility for
3.  to have (something) in the background;  to be in front (of something)
Verb (5-dan, う, intransitive)
4.  to be conceited;  to think highly of oneself
in the form しょってる
when read as "しょう"